Improvement in barbers  chairs



1, GRIENDLING, Sr.

BARBERSWHAIR. No. 190,317. Patented May 1, 1877.

N. PETERS. PHOTO-LITHDGRAPHER, WASHINGTON, D c.

UNITED STATES PATENT, @FFIC,

JOHN GRIENDLING, SR, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN BARBERS CHAIRS.

Specification forming part of Letters Patent No. 190,317, dated May 1,1877; application filed December 22, 1876.

To all whom it may concern Be it known that I, JOHN GBIENDLING, Sr., ofPhiladelphia, in the county of Philadelphia and State of Pennsylvania,have invented certain new and useful Improvements in Barber- Ghairs; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it pertains to make and use it, reference being had to theaccompanying drawings, which form part of this specification, in which-Figure 1 is a side elevation of a chair with my improvements attachedthereto. Figs. 2 and 3 are detail sectional elevations.

My invention has relation to that class of barbers chairs in which ahinged adjustable back is raised and lowered by means of a handwheel andscrew; and my improvements have reference to the special constructionand combination hereinafter described, the object of said improvementsbeing to simplify and cheapen the cost of manufacture, and at the sametime increase the efiiciency of the parts by means of which the back isadjusted Referring to the accompanying drawings, which illustrate myimprovements applied, A is a chair, and B the back thereof, having armsI) b, pivoted or hinged at c to the standards or supports (J. D is anadjustable headrest.

E is a bracket, attached to back part of the seat or chair frame, beingfastened thereto by screws e e. Said bracket has a projecting flange orcar, 6 and stud or boss 6 the latter forming a hearing or socket for ahorizontal shaft, 1, and step for a vertical screw shaft or spindle, G.The shaftf has a bcvel-gear,f and hand-wheel F; and the screw-spindle Ghas a bevel-gear, g, which meshes with that on the shaft f. Said shaftis held to its place in the bracketE by a screw, f having an enlargedhead, which fits in a countersunk recess in the back of said bracket.

The bracket E has a smooth opening, through I which the spindle Gpasses, said spindle being i also smooth at its lower extremity, orwhere it passes through the bracket. The upper extremity of said spindlepasses into a threaded nut, I, said nut being formed with trunnions t i,on which are pivoted or swiveled arms K K. The upper extremities of saidarms are bifurcated, as shown, and attached by pins 1 Z to the ears m mof plates M M, which are secured by screws m to the chair-back B.

To secure the necessary adjustment of the chair-back, the hand-wheel Gis turned, the number of turns required to elevate or lower said backtoits full extent being governed by the relative proportions of thegear-wheels and the pitch of the thread on the spindle G.

What I claim as my invention is 1. The bracket E, having flange e andstur or boss 6 the latter forming a socket or bearing for the shaft fand step for the screwspindle G, substantially as shown and described.

2. The combination, with the shaft f, having its bearing in the stud cof the screwspindle G, having bevel-gear g, located below the flange eof the bracket E, and meshing with the wheel f on said shattf,substantially as shown and described.

3. The combination of the screw-spindle G, nut I, having trunnions M,swiveled arms K K, and plates M M, secured to the chair-back B,substantially as shown and described.

4. The chair A, having back B, hinged to standards 0, in combinationwith bracket E, formed with flange e and boss 6 shaftf, having gear fand hand-wheel F, screw-spindle G, secured to gear-wheel g, and nut I,having trunnions "i i, swiveled arms K K, and plates M M, constructedand arranged for joint operation, substantially as shown and set forth.

In testimony that I claim the foregoing I have hereunto set my hand this19th day of December, 1876.

JOHN GRIENDLING, SR.

Witnesses HERMANN DOYENHARDT, GEORG BEUTLER.

